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Finding the Fourth Proportional to 261,352.40, 392,028.60 and 161,187.80

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Solution

The fourth proportional to 261,352.40, 392,028.60 and 161,187.80 is: 241,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,352.40 : 392,028.60 = 161,187.80 : x
  2. Step 2: Convert to fraction form
    261,352.40/392,028.60 = 161,187.80/x
  3. Step 3: Cross multiply
    261,352.40x = 392,028.60 × 161,187.80
  4. Step 4: Simplify right side
    261,352.40x = 63,190,227,571.08
  5. Step 5: Solve for x
    x = 63,190,227,571.08/261,352.40
  6. Step 6: Final answer
    x = 241,781.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.